Replacements for the Gauntlet?

You can use any vehicle to replace it with, although it's best to use the same type of vehicle. Just rename the YTD/YFT files to their respective gauntlet names and edit the handling to make it replace the gauntlet instead.

Try searching for a real-life counterpart, such as Dodge Challenger mods. They either replace the gauntlet directly or provide an add-on which you can extract files from, rename and replace the in-game gauntlet like @Jitnaught mentioned.